Automatic brake-applying device.



1a. P. Jrgssol AUTOMATIC BRAKE APPLYING DEVICE..

APILIOATION IILBDVIHE. 11, 1909.

2 SHBETBTSHEET 1.

- Patented oat mme Pneus, un. Lmn.. wxsnmmou, D c.

E. LJESSOP. y AUTOMATIC BRAKE APPLYING DEVICE. APPLIOATION FILED MAR.11, 1909.

936,905. Patented oct.12,1909.

Z SHEETS-SHEET 2.

EPJe$30p noms Puras lu: umm, msmnsm. D. tx

EARL r. .'iEssoP, or THE UNITED ,STATES NAVY.

AUTOMATIC BRAKE-APPLYING DEVICE.

Specification of Letters Intent.

VApplication tiled Iaroh 11, 1909. Serial No. 482,797. v

tion of the invention, such as .will enable others skilled in the art towhich it appel'- tains to make and use. the same.

. lever carried by the car or train striking section along the line 6-6of said block, and mechanism controlled by said lever for setting thebrakes and maintainingthe parts in the thrown position until the.

action reversed by manually controlled mechanism, as will be hereinafterdescribed.

My invention will be understood by reference to the accompanyingdrawings, in

which the saine parts are indicated by the same letters throughout theseveral views.

Figure l is a side elevation ofthe device as applied to the cab of anengine, the lcab and tender being indicated in' dotted lines.

Fig. 2 'illustrates diagrainlnatically the connection of the variousparts. Fig. 3 shows a section through the valve mechanism controlled bythe lever. Fig. 4. shows a section `through the valve mechanism manuallycontrolled by the engineer. Fig. 5 is a plan view of the track device.and Figl' shows a Fig. 5, looking in the direction of the arrows.

Referring to Figs. 1, 2. 5 and (i, A represents one of the-track rails.B represents a tripping block,4 having wedge faces whose angle ofinclination may be varied to suit the conditions as to speed, etc.,likely to be encountered. This tripping block is hinged, as at l), tothe cross-ties, and may be thrown into and ont. of operative position,as shown in full and dotted lines in Fig. 6, by a rod C, and anysuitable device D which may be operated either by hand, or from adistance, 'as is well known in the art.

F, see Fig. 2, is a lever pivoted, as at f', t the plate E, secured tothe cab of the engine, which leverl carries at one endthe roller j', andat the other end is connected by the link G and block H'to the pistonvalve H,which will be. hereinafter called the operating "UNrrED sTAfriisforriion.

Patented Oct. 12, l1.909.

valve, while the valve in the cab will be hereinafter called theengineer-s valve. This piston valve H is in the form of a cylinder cutaway, as at h and h', (see Fig. 3), and is provided with a pistonjh2 atits upper end, tit snugly in the largechamber I ofthe 'cylindrical valvecasing I, which casing is pro vided with an exhaust port i, whichexhaust port registers with the annular chamber Il when the valve is inthe raised position shown in Fig. 3'. It will be noted that the distancebetween the port z' and the inlet of the pipe R is materially less `thanthe throw of the valve H', to secure results hereinafter to beexplained. Projecting from the block H, and moving with the valve H', isthe stud K, connected to therod K', which is pivoted to the a'rm K2 ofthe valve L, which valve is connected by. the hose M to the train pipeM', see Fig. 1.

" N represents an air flask, connected by the pipe a tothe pressure pipeO, which pipe is connected at its other end tothe port p in the valvecasing P, containing the engineers valve Q. This valve casing isprovided with ports p and p2 open to the atmosphere, p3 connected to thepipe S, and p* connectedl to the pipe T, and p' connected to the pipe R.The pipe S opens into the upper end of the valvel casing I, above thepiston 71,2. The

The pipe O is provided with into the annular chamber li, and the otherend'of this pipe opens into the casing P beneath the valve Q, as shownin Fig. 4. The valveQ is in the. form of a cylinder with annularchanibersg and g2 separated by thel rib' g, fitting snugly in the valvecasing, -as shown in Fig. 4. This valve may be con' trolled by hand bymeans of the lever `Q2 v and link Q. Qf' is a stop provided to limit thethrow of the lever Q2.

The operation of the device is as follows 'It heilig desired by thestation operlatoi' to apply the brakes to the train, he throws thetripping block B from the position indicated in dotted lines in Fig. 6to the position indicated in full'lines in said figure. Then when thetrain approaches, the roller f will roll up on the inclined surface ofsaid H down. The downward movement of this valve will cause the "od K toopen the valve L, and permit the escape of air from the train pipe,which will'apply the emergency operation of the brakes in the usual way.The downward 'movement of the valve H' will close the lexhaust port 2',and will nnmask the port 2'", permitting pressure to flow through thebranch pipe R and pipe R to the lower end of the valve casing P.

v`This will `:torce the engineers valve up until its movement is stoppedby the lever Q2 striking the stop Q3. In this position, the pipe T willbe open -to the atmosphere through the port p2, thus relieving thepressure in the chamber I beneath the piston h2 and the exhaust' port p'will be closed, causing pressure to flow from the pipe O through thepipe S to the upper side of the piston h2, and thus the pressure fromthe pipe O'Will hold the" engineers valve in the raised and theoperating valve in the lowered position indefinitely. It will be seenthat the valve H need only be moved through a small part of its travelbythe lever F before the port v" is unmasked wlienthe further movement 'ofthe valve H willbe automatically effectedfby the air pressure.` Theamount of lift which the tripping block B will impart to the lever 'F,resulting` in a corresponding pull on the 'valve H', will vary onaccount of the jump and vibration of the train, and if this lift of thelever F alone were depended upon to complete the motion of the parts, avarying throw would be secured, and possibly alsoan insufficient throwof the train pipe valve L; also the engineers .control would be lesssatisfactory.

' dien it is desired to restore the parts to the initial position. theengineer presses down on the lever Q2, restoringthe eiigineers .valve tothe position shown in Fig. 4. This will allow the pressure fromthe pipeS to es ape tlirough'the port p and the pressure from the pipe O to flowinto the pipe T, forcing'the operating valve upward again, andyunmasking the exhaust port i. which will relieve the pressure Vin thepipe R. and

the engineeris valvewill remain seated, due

to its -own weight. Thus it will be seen that l provide automatic meanstor setting the S brakes and for holding them set until released by theeiigiiieei. or other operative if the car.

The device being air controlled on a full pressure and wide open exhaustsystem. it is not liable to be thrown out of order by leakage.vMoreover. it is very simple in construction and arrangement, and is notliable to get out of order from other causes.

if the engineers valve is pulled up by hand,

pressure will be applied through the pipey S to the top of the pistonh2, which will It will be obvious that any suitable signal' 'may becontrolled b v the movement either of the engineers valve or of theoperating valve if desired.

Having thus described my invention. what l claim .and desire to secure hv Letters Patent of the l'nited States is:-

l. In a system of the cha acter described. the combination with amovable tripping block located on the road-bed. a lever carri-xd bythecar and adapted to strike said trip ping block when in the operativeposition. valve mechanism operated liv said lever. means controlled b vsaid mechanism for var ving the pressure in the train pipe. a secondvalvf,` mechanism controlled h v the operation 'of the first. a sourceof fluid pressure connected to both valve mechanisms` and a systemo'tvpipes connecting the said valve mechanisms. whereby the throw ot'the firstvalve .effects the throw of' the second. and restoring thesecond valve to the initial position effects the restoration of bothmechanisms to said position, substantially as described.

ln a system of the character described. the combination with a movabletripping block located on the road-bed, a lever carried by the earadapted to strike said tripping block when in the operative position.valve mechanism operated by said lever, means controlled b vsaidmechanism for varying the pressure in the t'rain pip a second valveiiwcliaiiisin controlled by the movement of the first val e.nieansformoving' said second Valve by hand, a source of fluidpressure.connected to both valve mechanisms. and a s vsteni ol' pipesconnecting the said valve mechanisms. whereby the throw of the firstvalve elt'ects the restoration (if-both mechanisms to Said position.substantially as described.

il. ln a svstein of the character described. the combination with amovable tripping block located on the road-bed, a lever carried h v the.carV adapted to strike said tripping block when in the operativeposition, a valve casing provided with a. series of inlet )Orts and anexhaust port. a slide valve in sai easing and operated by said lever,means controlled by the movement of said valve for vai-ving the pressurein the train pipe, a second valve casing provided with a ilurality i ofinlet and exhaust` ports, a slice valve Should it be desired to test theapparatus,

mounted in said second valve casing, a source of fluid pressureconnected to both valve casings, and a system of pipes connecting thesaid inlet ports in the two casings, whereby the throw ofthe first valveetfects the throw ltlt) of the second, and restoring the second valve tothe' initial position e ti`ects the restoration of the first valve tosaid position, substani tially as described.

4. Iii a system of the character dcribed, the combination with lamovable trippingl block. located on the road-bed, a lever carrie by thecaradaptcd to strike said tripping lblock when in the operativeposition, a. valve casing provided with a series of inlet ports and anexhaust port, a slide valve in said casing and operated by said lever,means con.-

Vtrollcd b v the movement of said valve for varying the pressure in thetrain pipe, a sec- 'oiid valve asing provided with a plurality of inletand exhaust ports, a slide valve mounted in said second valve casing, ahand lever connet-ted to said second valve, a source of Huid pressureconnected to both valve casings, and a Asystem of pipes connecting thesaid inlet ports in the two casigs, whereby the throw of the lrst valveetl'ects the throw of the second. and restoring the second valve to theinitial position etl'ects the restoration of the first valve to saiddescribed.

5. In a system of the character described, the 'combination with .amovable tripping block located on the road-bed, a lever carried by thecar and-adapted to strike said tripping block when in the operativeposition, a valve casing carriedby the car, a valve mounted in saidcasing and operated by said lever, a second valve casing also carried bythe car, a valve mounted in said second casing, a source of fluidpressure connected to both valvefcasings, suitable inlet and exhaustp'orts'in said casings, and a system of pipes connecting the said valvecasings, whereby the throw of the first valve effects the throwof thesecond, and restoring the second'valve to the initial position effectsthe restoration of the lirst valve to said position, substantially `asdescribed.

(i. `ln a system of the character described, the combina-tion with amovable tripping block located on the road-bed, a lever carried by thecar and adapted to strike said tripping block when in the operativeposition, a valve casing carried by the car, a .valveniounted in saidcasing and operated by said lever, means var 'ing the pressure in theti'ain pi e, alsecondvalve casing also carriedby t e car, a valvemounted in'said second,casing,a hand lever connected to said secondvalve for moving the same by hand, if desired, a source of lfluidpressure connected to both `valve casy ings, suitable inlet. andnexhaust; ports in said' position, substantially as.

vend o said casin scribed, comprising a lever carried bv tlu car, meanslocated on the road-bed t'or tripsired, means operated b v the movementof i the said piston valve for opening and closing `said train pipevalve, ra yvalve casing I for said piston valve, provided with anenlarged chamber I to-receive said piston li, and

with an'exhaust port z' normally registering .n

with said annular recess la. an engineer's valve Q in the form of apiston provided with annulargrooves q', g2, a casing P for saideneineers valve provided with exhaust ports p and p2 opening intothe-atmosphere. ports p3, g2 and p* located between said cxliaust ports,and a port pf' opening into thcl end of said casing P, a source ot'pressure. and pipes O, O leading therefrom to both piston valve casings,the pipe R opening` into said port p", and into the valve casing Iopposite the annular roove It when the valve H is in the norma position.a branch pipe R opening 'into said casing I abreast said annular grooveh', the pipe T connecting saidport if* and the chamber I at the lowerside of the piston h2, and the pipe S connecting said port p3 and` saidchamber I at the upper side of said piston, substantially 'as and forthe purposes described.

8. An apparatus of the -character described, comprising a lever carriedby the car, means located on the road-bedfor trip'- ping said lever whendesired, a piston valve H provided kwith annular grooves h, i, andpiston h2, a valve connected to the train pipe for relieving thepressure therein when desired, means operated by the movement of thesaid piston valve for opening and closing said train pipe valve, avalve, casing I for said piston valve provided with anenlargcd chamber I.to receive said piston h2, and with yan exhaust port z' normallyregistering with said annular recess h, van engiiieers valve Q in theform of a piston provided with annular grooves g', g2, a casing P forsaid en ineersvalve provided with exhaust ports y) and p2 opening intothe atmosphere, controlled by the movement ofpsaid valve for orts p3, pand p* located between said exmust orts, anda ort p openinr into the asource efe pressure, and pipes O, O eading therefrom to both pistonvalve casings, the pipe R opening into said port p, and into the valvecasing I op osite the annular groove, li when the va ve 'Hf is in thenormal position, a branch pipe R o eniiig into said casing I abreastsaid annu argroove i, the pipe T connecting said port p4. yand thechamber -I at the lower side of the piston h",'and the pipe S connectingsaid ort p3 and said chamber I l at the upper si e of said piston, thehand -lever Q2 connected to said engineers valve,

iso

/ried by the car' adapted to Str'ike said` tripping block -when in theoperative position,

` a valve casing provided vwith a series'of inlet ports' and an exhaustport, a slide valve 4iii-said casing' and moved through a part onlvofthe' throw by said lever. nieaiii: controlled hy the movement of saidvalve for" I Varying the pressure in the train pipe. a second valvecasing provided with a plurality'of inlet and exhaust ports. a slide`valve mounted in Said second valve easing,

a source of fluid priwsure connected to both valve casings, and a systemot' pipesI connecting-the Said inlet ports in lthe tivo cas.- f ings.whereby the partlal throuj ofthe first valve-by the lever e'ects theconiplete' throwof the first valve, and the complete throw of this valveeifects the throuo lthe second, and restoring the Second valvel totheinitial position effects the restorftlon of the first valve to saidposition Substantiall.' as described. 'ln testiinonv whereof, iIaix niysignature, in presence of two witnesses.v

EARL I. JESSOl.

